<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <script src="../00_static/js/vue.js" type="text/javascript"></script>
    <title>列表排序</title>
</head>

<body>
    <div id="app">
        <input v-model="keyWord" type="text" placeholder="请输入姓名">
        <button @click="sortType = 1">年龄升序↑</button>
        <button @click="sortType = 2">年龄降序↓</button>
        <button @click="sortType = 0">原顺序</button>
        <ul>
            <!-- 遍历数组 -->
            <li v-for="(p,index) in fmtPersons" :key="p.id">
                {{p.name}}--{{p.sex}}--{{p.age}}岁
            </li>
        </ul>
    </div>

    <script type="text/javascript">
        new Vue({
            el: "#app",
            data: {
                keyWord: '',
                sortType: 0,
                persons: [
                    { id: '001', name: '张三丰', age: 24, sex: '男' },
                    { id: '002', name: '李丰四', age: 21, sex: '女' },
                    { id: '003', name: '王五李', age: 22, sex: '男' },
                    { id: '004', name: '赵王六', age: 23, sex: '女' },
                ],
            },
            computed: {
                fmtPersons() {
                    const { persons, keyWord, sortType } = this
                    let arr = persons.filter(p => p.name.indexOf(keyWord) !== -1)
                    if (sortType) {
                        arr.sort((a, b) => {
                            if (sortType === 1) return a.age - b.age
                            else return b.age - a.age
                        })
                    }
                    return arr
                },
            }
        })
    </script>
</body>

</html>